Useful VR APIs

    public Transform handTransform;
    void Update()
    {

        if (OVRInput.GetDown(OVRInput.Button.PrimaryHandTrigger))
        {
           //Do something when click the button on the VR controller
        }

        //Get thumbstick input
        Vector2 primaryAxis = OVRInput.Get(OVRInput.Axis2D.PrimaryThumbstick);
        Vector2 secondaryAxis = OVRInput.Get(OVRInput.Axis2D.SecondaryThumbstick);

        //Create raycast from VR hand (For virtual pointer)
        RaycastHit hit;
        if (Physics.Raycast(handTransform.position, handTransform.forward, out hit, 25.0f))
        {
            GameObject hittedGameObject = hit.transform.gameObject;
        }
    }